TO: Board of Supervisors
FROM: Steven Lederer - Director of Public Works
REPORT BY: Roberto De La Torre Real - Assistant Engineer
SUBJECT: Award of Construction Contract and Approval of Amendment No. 1 for the "White Sulphur Spring Rd Slide Repair", RDS 26-37
RECOMMENDATION
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Award of Construction Contract to Rege Construction, of Cloverdale, CA in the amount of $602,598 for the "White Sulphur Spring Rd Slide Repair", RDS 26-37 (Project 26027); and approve and authorize Amendment No. 1 to Agreement No. 260300B with ADKO Engineering, Inc. increasing the contract maximum from $366,922 to $423,176 to provide additional biological monitoring and preconstruction survey services for the Project. (Fiscal Impact: $955,000 Expense for the construction contract and other project costs; General Fund; Reallocation of Budget; Discretionary)
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BACKGROUND
Damage occurred at 3260 White Sulphur Spring Road from the storm events that occurred in Napa County in November of 2025. The failure at 3260 White Sulphur Sporing Rd consists of an upslope failure on the west side of the roadway, where a hillside previously impacted by Napa County wildfires slid and damage a portion of the road. The slide area is approximately 130 linear feet in length, and the preferred repair method is to install a 150-foot-long and 10-foot-high soldier pile retaining wall. The affected roadway will also be raised and repaved to restore the asphalt concrete surface to pre-slide conditions.
On March 10, 2026, the Board of Supervisors authorized creation of the "White Sulphur Spring Rd Slide" project 26027 and a budget transfer of $446,922 was allocated for the project using the Roads Operating Fund (Fund 2040, Sub-Division 2040000). Of this amount, $366,922 was allocated for design services and $80,000 for staff time.
On June 16, 2026, the Board of Supervisors approved the plans and specifications and authorized to advertise for sealed bids and opening of the bids pursuant to Section 20150.8 of th...
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